| ????????????y=ax2+bx+c???a???b???c????????????a???0????????????????????? ??????b2-4ac=0?????????????????????????????????x????????? ??????a-b+c=0???????????????????????????-1???0?????? ??????a???0????????????????????????ax2+bx+c=0?????????x1???x2???x1???x2?????????ax2+bx+c???0????????????x1???x???x2??? ??????b=3a+
??????????????????______?????????????????????????????????????????? |
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','http://www.zhongkaobang.com/data/attach/logo/logo.png', '推荐 北方的狗 的问题《????????????y=ax2+bx+c???a???b???c????????????a???0???????????????????????????b2-4ac=0?????????????????????????????????x???????????????a-b+c=0???????????????????????????-1???..._?????????》','http://www.zhongkaobang.com/q-375453.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
一周热门 更多>